EP3744739B1 - Procédé de production de caoutchouc de nitrile hydrogéné contenant un groupe carboxyle - Google Patents
Procédé de production de caoutchouc de nitrile hydrogéné contenant un groupe carboxyle Download PDFInfo
- Publication number
- EP3744739B1 EP3744739B1 EP19743563.9A EP19743563A EP3744739B1 EP 3744739 B1 EP3744739 B1 EP 3744739B1 EP 19743563 A EP19743563 A EP 19743563A EP 3744739 B1 EP3744739 B1 EP 3744739B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carboxy group
- nitrile rubber
- latex
- hydrogenated nitrile
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 title claims description 215
- 229920000459 Nitrile rubber Polymers 0.000 title claims description 205
- 238000004519 manufacturing process Methods 0.000 title claims description 52
- 229920000126 latex Polymers 0.000 claims description 168
- 239000004816 latex Substances 0.000 claims description 166
- 238000005984 hydrogenation reaction Methods 0.000 claims description 120
- 239000000178 monomer Substances 0.000 claims description 92
- 229920001971 elastomer Polymers 0.000 claims description 62
- 239000005060 rubber Substances 0.000 claims description 62
- 239000000203 mixture Substances 0.000 claims description 61
- 238000010438 heat treatment Methods 0.000 claims description 60
- 239000003054 catalyst Substances 0.000 claims description 57
- 238000000034 method Methods 0.000 claims description 31
- 238000004132 cross linking Methods 0.000 claims description 29
- 239000003431 cross linking reagent Substances 0.000 claims description 23
- 150000002825 nitriles Chemical class 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 5
- 230000000379 polymerizing effect Effects 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 70
- 229910052751 metal Inorganic materials 0.000 description 39
- 239000002184 metal Substances 0.000 description 39
- 229910052763 palladium Inorganic materials 0.000 description 35
- 238000006116 polymerization reaction Methods 0.000 description 32
- -1 monocarboxylic acid ester Chemical class 0.000 description 29
- 229910052740 iodine Inorganic materials 0.000 description 28
- 239000011630 iodine Substances 0.000 description 28
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 27
- 125000003396 thiol group Chemical group [H]S* 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 24
- 239000003607 modifier Substances 0.000 description 23
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 21
- 239000007787 solid Substances 0.000 description 19
- JGUQDUKBUKFFRO-CIIODKQPSA-N dimethylglyoxime Chemical compound O/N=C(/C)\C(\C)=N\O JGUQDUKBUKFFRO-CIIODKQPSA-N 0.000 description 16
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 14
- 238000005259 measurement Methods 0.000 description 14
- 125000004432 carbon atom Chemical group C* 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- UTOVMEACOLCUCK-PLNGDYQASA-N butyl maleate Chemical compound CCCCOC(=O)\C=C/C(O)=O UTOVMEACOLCUCK-PLNGDYQASA-N 0.000 description 9
- 229940018560 citraconate Drugs 0.000 description 9
- 239000003505 polymerization initiator Substances 0.000 description 9
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 8
- 239000008139 complexing agent Substances 0.000 description 8
- 150000001993 dienes Chemical class 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 7
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000007720 emulsion polymerization reaction Methods 0.000 description 7
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003995 emulsifying agent Substances 0.000 description 6
- 229920000768 polyamine Polymers 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 238000013329 compounding Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000007334 copolymerization reaction Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Natural products CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 4
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 150000002688 maleic acid derivatives Chemical class 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 150000003335 secondary amines Chemical class 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-UHFFFAOYSA-N 0.000 description 3
- XSQHUYDRSDBCHN-UHFFFAOYSA-N 2,3-dimethyl-2-propan-2-ylbutanenitrile Chemical compound CC(C)C(C)(C#N)C(C)C XSQHUYDRSDBCHN-UHFFFAOYSA-N 0.000 description 3
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 125000005907 alkyl ester group Chemical group 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 239000002738 chelating agent Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 125000003963 dichloro group Chemical group Cl* 0.000 description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 150000001451 organic peroxides Chemical class 0.000 description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- DQJSFBCVEPQRLA-UHFFFAOYSA-N 1-methoxyethyl prop-2-enoate Chemical compound COC(C)OC(=O)C=C DQJSFBCVEPQRLA-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- SDJHPPZKZZWAKF-UHFFFAOYSA-N 2,3-dimethylbuta-1,3-diene Chemical compound CC(=C)C(C)=C SDJHPPZKZZWAKF-UHFFFAOYSA-N 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- OKVDGQVSUDTBJI-UHFFFAOYSA-N 2-methoxy-1-methylimidazole Chemical compound COC1=NC=CN1C OKVDGQVSUDTBJI-UHFFFAOYSA-N 0.000 description 2
- HFCUBKYHMMPGBY-UHFFFAOYSA-N 2-methoxyethyl prop-2-enoate Chemical compound COCCOC(=O)C=C HFCUBKYHMMPGBY-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- KMKWGXGSGPYISJ-UHFFFAOYSA-N 4-[4-[2-[4-(4-aminophenoxy)phenyl]propan-2-yl]phenoxy]aniline Chemical compound C=1C=C(OC=2C=CC(N)=CC=2)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(N)C=C1 KMKWGXGSGPYISJ-UHFFFAOYSA-N 0.000 description 2
- QGMGHALXLXKCBD-UHFFFAOYSA-N 4-amino-n-(2-aminophenyl)benzamide Chemical compound C1=CC(N)=CC=C1C(=O)NC1=CC=CC=C1N QGMGHALXLXKCBD-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 2
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QYTDEUPAUMOIOP-UHFFFAOYSA-N TEMPO Chemical group CC1(C)CCCC(C)(C)N1[O] QYTDEUPAUMOIOP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 125000004183 alkoxy alkyl group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 150000008064 anhydrides Chemical class 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 2
- ZQMIGQNCOMNODD-UHFFFAOYSA-N diacetyl peroxide Chemical compound CC(=O)OOC(C)=O ZQMIGQNCOMNODD-UHFFFAOYSA-N 0.000 description 2
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- AUZONCFQVSMFAP-UHFFFAOYSA-N disulfiram Chemical compound CCN(CC)C(=S)SSC(=S)N(CC)CC AUZONCFQVSMFAP-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 2
- XLYMOEINVGRTEX-UHFFFAOYSA-N fumaric acid monoethyl ester Natural products CCOC(=O)C=CC(O)=O XLYMOEINVGRTEX-UHFFFAOYSA-N 0.000 description 2
- NKHAVTQWNUWKEO-UHFFFAOYSA-N fumaric acid monomethyl ester Natural products COC(=O)C=CC(O)=O NKHAVTQWNUWKEO-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N isopropyl alcohol Natural products CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 description 2
- 125000002560 nitrile group Chemical group 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 150000002940 palladium Chemical class 0.000 description 2
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005185 salting out Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- RRKODOZNUZCUBN-CCAGOZQPSA-N (1z,3z)-cycloocta-1,3-diene Chemical compound C1CC\C=C/C=C\C1 RRKODOZNUZCUBN-CCAGOZQPSA-N 0.000 description 1
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical compound C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- XVOUMQNXTGKGMA-OWOJBTEDSA-N (E)-glutaconic acid Chemical compound OC(=O)C\C=C\C(O)=O XVOUMQNXTGKGMA-OWOJBTEDSA-N 0.000 description 1
- CUNNCKOPAWXYDX-KQQUZDAGSA-N (NE)-N-[(2E)-2-hydroxyiminocyclohexylidene]hydroxylamine Chemical compound O\N=C1/CCCC/C/1=N\O CUNNCKOPAWXYDX-KQQUZDAGSA-N 0.000 description 1
- ZJYCLOLEIIBKBW-SREVYHEPSA-N (Z)-4-(1-ethylcyclohexyl)oxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C/C(=O)OC1(CC)CCCCC1 ZJYCLOLEIIBKBW-SREVYHEPSA-N 0.000 description 1
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- 239000003002 pH adjusting agent Substances 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- WLJVNTCWHIRURA-UHFFFAOYSA-M pimelate(1-) Chemical compound OC(=O)CCCCCC([O-])=O WLJVNTCWHIRURA-UHFFFAOYSA-M 0.000 description 1
- KNBRWWCHBRQLNY-UHFFFAOYSA-N piperidine-1-carbothioylsulfanyl piperidine-1-carbodithioate Chemical compound C1CCCCN1C(=S)SSC(=S)N1CCCCC1 KNBRWWCHBRQLNY-UHFFFAOYSA-N 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 150000003254 radicals Chemical group 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007717 redox polymerization reaction Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- TYFQFVWCELRYAO-UHFFFAOYSA-L suberate(2-) Chemical compound [O-]C(=O)CCCCCCC([O-])=O TYFQFVWCELRYAO-UHFFFAOYSA-L 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- DXNCZXXFRKPEPY-UHFFFAOYSA-N tridecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCC(O)=O DXNCZXXFRKPEPY-UHFFFAOYSA-N 0.000 description 1
- 125000005591 trimellitate group Chemical group 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/02—Hydrogenation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/06—Butadiene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
Definitions
- the present invention relates to a method for producing a carboxy group-containing hydrogenated nitrile rubber, and more specifically relates to a method for producing a carboxy group-containing hydrogenated nitrile rubber with high production efficiency.
- nitrile rubbers acrylonitrile-butadiene copolymerized rubbers
- a hydrogenated nitrile rubber which is obtained by hydrogenating carbon-carbon double bonds in the polymer backbone of a nitrile rubber, has higher heat resistance, and thus, is used for rubber parts such as seals, belts, hoses, and diaphragms.
- a carboxy group-containing hydrogenated nitrile rubber which is prepared by introducing a carboxy group as a modifying group to the hydrogenated nitrile rubber to impart a variety of properties such as permanent compression set resistance to such a hydrogenated nitrile rubber (see Patent Document 1, for example).
- An object of the present invention is to provide a method for producing a carboxy group-containing hydrogenated nitrile rubber with high production efficiency.
- the present inventor who has conducted extensive research, has found that the above object can be achieved by heating a latex of a carboxy group-containing nitrile rubber at a predetermined temperature in the state where the pH is adjusted in a range of 8.5 to 12, adjusting the pH of the latex of the carboxy group-containing nitrile rubber after the heating in a range of 5 to 8, and performing a hydrogenation reaction, and have completed the present invention.
- the present invention provides a method for producing a carboxy group-containing hydrogenated nitrile rubber, comprising a step of preparing a latex of a carboxy group-containing nitrile rubber by emulsion polymerizing a monomer mixture in a dispersive medium, the monomer mixture containing at least an ⁇ , ⁇ -ethylenically unsaturated nitrile monomer and a carboxy group-containing monomer;
- the latex of the carboxy group-containing nitrile rubber be heated under a reduced pressure condition.
- the production method according to the present invention further comprise a step of removing the hydrogenation catalyst from the latex of the carboxy group-containing nitrile rubber after the hydrogenation reaction.
- the carboxy group-containing hydrogenated nitrile rubber contain 5 to 60 wt% of the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer and 1 to 30 wt% of the carboxy group-containing monomer.
- the present invention provides a method for producing a cross-linkable rubber composition, comprising producing a carboxy group-containing hydrogenated nitrile rubber by the above-mentioned method; and mixing the carboxy group-containing hydrogenated nitrile rubber with a cross-linking agent.
- the present invention provides a method for producing a cross-linked rubber, comprising producing a cross-linkable rubber composition by the above-mentioned method; and cross-linking the cross-linkable rubber composition.
- the present invention can produce a carboxy group-containing hydrogenated nitrile rubber with high production efficiency.
- the method for producing a carboxy group-containing hydrogenated nitrile rubber according to the present invention comprises:
- the polymerization step in the production method according to the present invention is a step of preparing a latex of a carboxy group-containing nitrile rubber by emulsion polymerizing a monomer mixture in a dispersive medium, the monomer mixture containing at least an ⁇ , ⁇ -ethylenically unsaturated nitrile monomer and a carboxy group-containing monomer.
- the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer can be any ⁇ , ⁇ -ethylenically unsaturated compound having a nitrile group.
- examples thereof include acrylonitrile; ⁇ -halogenoacrylonitriles such as ⁇ -chloroacrylonitrile and ⁇ -bromoacrylonitrile; ⁇ -alkyl acrylonitriles such as methacrylonitrile and ethacrylonitrile; and the like.
- preferred are acrylonitrile and methacrylonitrile, and particularly preferred is acrylonitrile.
- These ⁇ , ⁇ -ethylenically unsaturated nitrile monomers may be used alone or in combination.
- the amount of the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer to be used may be appropriately determined according to the composition of the carboxy group-containing hydrogenated nitrile rubber finally prepared.
- the proportion of ⁇ , ⁇ -ethylenically unsaturated nitrile monomer units in the carboxy group-containing hydrogenated nitrile rubber is preferably 5 to 60 wt%, more preferably 10 to 60 wt%, still more preferably 10 to 55 wt%.
- the resulting carboxy group-containing hydrogenated nitrile rubber can provide a cross-linked rubber having high oil resistance and cold resistance.
- the carboxy group-containing monomer can be any monomer which is copolymerizable with the ⁇ , ⁇ -ethylenically unsaturated nitrile monomer and has one or more unsubstituted (free) carboxy groups such as unesterified carboxyl groups.
- the carboxy group-containing monomer By using the carboxy group-containing monomer, the resulting rubber can have carboxy groups introduced thereto.
- Examples of the carboxy group-containing monomer used in the present invention include ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid monomers, ⁇ , ⁇ -ethylenically unsaturated polyvalent carboxylic acid monomers, ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid monoester monomers, and the like.
- the carboxy group-containing monomer also includes these monomers where the carboxy group forms a salt of a carboxylic acid.
- anhydrides of ⁇ , ⁇ -ethylenically unsaturated polyvalent carboxylic acids can also be used as the carboxy group-containing monomer because a carboxy group is formed as a result of cleavage of the acid anhydride group after copolymerization.
- ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid monomers examples include acrylic acid, methacrylic acid, ethylacrylic acid, crotonic acid, cinnamic acid, and the like.
- Examples of the ⁇ , ⁇ -ethylenically unsaturated polyvalent carboxylic acid monomers include butenedioic acids such as fumaric acid and maleic acid, itaconic acid, citraconic acid, mesaconic acid, glutaconic acid, allylmalonic acid, teraconic acid, and the like.
- Examples of the anhydrides of the ⁇ , ⁇ -unsaturated polyvalent carboxylic acids include maleic anhydride, itaconic anhydride, citraconic anhydride, and the like.
- Examples of the ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid monoester monomers include monoalkyl maleate esters such as monomethyl maleate, monoethyl maleate, monopropyl maleate, and mono-n-butyl maleate; monocycloalkyl maleate esters such as monocyclopentyl maleate, monocyclohexylmaleate, and monocycloheptyl maleate; monoalkylcycloalkyl maleate esters such as monomethylcyclopentyl maleate and monoethylcyclohexyl maleate; monoalkyl fumarate esters such as monomethyl fumarate, monoethyl fumarate, monopropyl fumarate, and mono-n-butyl fumarate; monocycloalkyl fumarate esters such as monocyclopentyl fumarate, monocyclohexyl fumarate, and monocycloheptyl fumarate; monoalkylcycloalkyl fuma
- carboxy group-containing monomers may be used alone or in combination.
- the alkyl esters above preferably have C 2 to C 8 alkyl groups.
- the amount of the carboxy group-containing monomer to be used may be appropriately determined according to the composition of the carboxy group-containing hydrogenated nitrile rubber finally prepared.
- the proportion of carboxy group-containing monomer units in carboxy group-containing hydrogenated nitrile rubber is preferably 1 to 30 wt%, more preferably 2 to 25 wt%, still more preferably 2 to 20 wt%.
- a conjugated diene monomer be further added to the monomer mixture used in polymerization, and be further involved in the copolymerization.
- the conjugated diene monomer is preferably conjugated diene monomers having 4 to 6 carbon atoms, such as 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, and chloroprene, more preferably 1,3-butadiene and isoprene, particularly preferably 1,3-butadiene.
- conjugated diene monomers may be used alone or in combination.
- the amount of the conjugated diene monomer to be used may be appropriately determined according to the composition of the carboxy group-containing hydrogenated nitrile rubber finally prepared.
- the proportion of conjugated diene monomer units (also including those hydrogenated) in the carboxy group-containing hydrogenated nitrile rubber is preferably 10 to 80 wt%, more preferably 20 to 70 wt%, still more preferably 30 to 70 wt%.
- an ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid ester monomer may be further added to the monomer mixture used in polymerization, and may be further involved in the copolymerization.
- Examples of the ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid ester monomer include (meth)acrylate esters (abbreviation of "methacrylate esters and acrylate esters". The same applies to the description below.) having an alkyl group with 1 to 18 carbon atoms, such as methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, n-dodecyl acrylate, methyl methacrylate, and ethyl methacrylate; (meth)acrylate esters having an alkoxyalkyl group with 2 to 18 carbon atoms, such as 1-methoxyethyl acrylate, 2-methoxyethyl acrylate, ethoxypropyl acrylate, methoxybutyl acrylate, ethoxydodecyl acrylate, methoxyethyl methacrylate, methoxybutyl meth
- (meth)acrylate esters having an alkyl group with 1 to 18 carbon atoms preferred are (meth)acrylate esters having an alkoxyalkyl group with 2 to 18 carbon atoms, more preferred are n-butyl acrylate, 1-methoxyethyl acrylate, and 2-methoxyethyl acrylate, and particularly preferred is n-butyl acrylate.
- the proportion of ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid ester monomer units contained in the carboxy group-containing hydrogenated nitrile rubber is preferably 1 to 50 wt%, more preferably 5 to 45 wt%, still more preferably 10 to 40 wt%.
- different monomers copolymerizable with these monomers may be further added to the monomer mixture used in polymerization, and may be further involved in the copolymerization.
- examples of such different monomers include ethylene, ⁇ -olefin monomers, aromatic vinyl monomers, fluorine-containing vinyl monomers, copolymerizable anti-aging agents, and the like.
- the ⁇ -olefin monomers are preferably those having 3 to 12 carbon atoms. Examples thereof include propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, 1-octene, and the like.
- aromatic vinyl monomers examples include styrene, ⁇ -methylstyrene, vinylpyridine, and the like.
- fluorine-containing vinyl monomers examples include fluoroethyl vinyl ether, fluoropropyl vinyl ether, o-trifluoromethylstyrene, pentafluorovinyl benzoate, difluoroethylene, tetrafluoroethylene, and the like.
- copolymerizable anti-aging agents examples include N-(4-anilinophenyl)acrylamide, N-(4-anilinophenyl)methacrylamide, N-(4-anilinophenyl)cinnamamide, N-(4-anilinophenyl)crotonamide, N-phenyl-4-(3-vinylbenzyloxy) aniline, N-phenyl-4-(4-vinylbenzyloxy) aniline, and the like.
- the different copolymerizable monomers listed above may be used alone or in combination.
- the proportion of the different copolymerizable monomers used in the carboxy group-containing hydrogenated nitrile rubber is preferably 50 wt% or less, more preferably 40 wt% or less, still more preferably 10 wt% or less in terms of the proportion of units of these monomers contained.
- emulsion polymerization can be performed using polymerization additives usually used, in addition to an emulsifier, a polymerization initiator, and a molecular weight modifier.
- emulsifiers include, but should not be limited to, nonionic emulsifiers such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenol ethers, polyoxyethylene alkyl esters, and polyoxyethylene sorbitan alkyl esters; anionic emulsifiers such as salts of fatty acids such as myristic acid, palmitic acid, oleic acid, and linolenic acid, alkylbenzenesulfonate salts such as sodium dodecylbenzenesulfonate, condensates of naphthalenesulfonates and formalin, higher alcohol sulfated ester salts, and alkyl sulfosuccinate salts; copolymerizable emulsifiers such as sulfoesters of ⁇ , ⁇ -unsaturated carboxylic acids, sulfate esters of ⁇ , ⁇ -unsaturated carboxylic acids, and sulf
- the polymerization initiator is not particularly limited as long as it is a radical initiator.
- examples thereof include inorganic peroxides such as potassium persulfate, sodium persulfate, ammonium persulfate, potassium perphosphate, and hydrogen peroxide; organic peroxides such as t-butyl peroxide, cumene hydroperoxide, p-menthane hydroperoxide, di-t-butyl peroxide, t-butylcumyl peroxide, acetyl peroxide, isobutyryl peroxide, octanoyl peroxide, dibenzoyl peroxide, 3,5,5-trimethylhexanoyl peroxide, and t-butyl peroxyisobutyrate; azo compounds such as azobisisobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarbonitrile, and methyl azobisisobuty
- polymerization initiators can be used alone or in combination.
- Preferred polymerization initiators are inorganic or organic peroxides. When a peroxide is used as a polymerization initiator, it can also be used in combination with a reducing agent such as sodium bisulfite or ferrous sulfate as a redox polymerization initiator.
- the polymerization initiator is used in an amount of preferably 0.01 to 2 parts by weight relative to 100 parts by weight of the monomer mixture used in polymerization.
- the molecular weight modifier is not particularly limited, and any compound having a mercapto group can be preferably used.
- Examples thereof include compounds having 9 to 12 carbon atoms and a mercapto group such as 2,2,4,6,6-pentamethyl-4-heptanethiol, 2,4,4,6,6-pentamethyl-2-heptanethiol, 2,3,4,6,6-pentamethyl-2-heptanethiol, and 2,3,4,6,6-pentamethyl-3-heptanethiol; compounds having 13 to 16 carbon atoms and a mercapto group such as 2,2,4,6,6-pentamethyl-4-octanethiol and 2,2,4,6,6,8,8-heptamethyl-4-nonanethiol; t-dodecylmercaptan (mixture of compounds having 9 to 16 carbon atoms and a mercapto group); and the like.
- halogenated hydrocarbons such as carbon tetrachloride, methylene chloride, and methylene bromide; ⁇ -methylstyrene dimers; sulfur-containing compounds such as tetraethylthiuram disulfide, dipentamethylenethiuram disulfide, and diisopropylxanthogen disulfide; and the like may be used. These can be used alone or in combination.
- the molecular weight modifier is used in an amount of preferably 0.01 to 2 parts by weight, more preferably 0.05 to 1 parts by weight relative to 100 parts by weight of the monomer mixture used in polymerization.
- the dispersive medium usually used in emulsion polymerization is water.
- the amount of water is preferably 80 to 500 parts by weight, more preferably 80 to 300 parts by weight relative to 100 parts by weight of the monomer mixture used in polymerization.
- polymerization additives such as a polymerization terminator, a chelating agent, a builder, a stabilizer, a dispersant, a pH adjuster, an oxygen absorbing agent, a particle size adjuster, and the like can be further used as needed.
- polymerization additives such as a polymerization terminator, a chelating agent, a builder, a stabilizer, a dispersant, a pH adjuster, an oxygen absorbing agent, a particle size adjuster, and the like can be further used as needed.
- the type and the amount thereof to be used are not particularly limited.
- the polymerization conversion ratio in the emulsion polymerization is preferably 60 to 95%, more preferably 65 to 90%, still more preferably 75 to 90% to improve the properties of the resulting polymer and provide high productivity.
- the polymerization conversion ratio in the emulsion polymerization may be 87% or less.
- the latex of the carboxy group-containing nitrile rubber prepared through such a polymerization step can have a pH of usually 1 to 5, preferably 2 to 5, more preferably 2 to 4.
- the heating step in the production method according to the present invention is a step of heating the latex of the carboxy group-containing nitrile rubber prepared through the polymerization step above at 50 to 85°C in the state where the pH is adjusted in the range of 8.5 to 12.
- the latex of the carboxy group-containing nitrile rubber is heated at the above-mentioned temperature in the state where the pH is adjusted in the range of 8.5 to 12 and on the condition inhibiting the progression of the hydrogenation reaction. Thereafter, the pH of the latex of the carboxy group-containing nitrile rubber subjected to such heating is adjusted to 5 to 8, and the hydrogenation reaction is performed in the state where the pH is adjusted to 5 to 8. This results in favorable progression of the hydrogenation reaction even with a relatively small amount of a hydrogenation catalyst is used in the hydrogenation reaction. As a result, the carboxy group-containing hydrogenated nitrile rubber can be produced with high production efficiency.
- the hydrogenation reaction with a relatively small amount of the hydrogenation catalyst used in the hydrogenation reaction can favorably progress in the production method according to the present invention, thus reducing the amount of the hydrogenation catalyst to be used. Furthermore, when the hydrogenation catalyst is recovered and removed after the hydrogenation reaction, such a reduction in amount of the hydrogenation catalyst to be used results in efficient recovery and removal of the hydrogenation catalyst, thus providing high productivity.
- the hydrogenation catalyst used in the hydrogenation reaction is usually an expensive noble metal or the like, it is desired that the amount of the hydrogenation catalyst to be used is reduced as much as possible from the viewpoint of productivity. Furthermore, the hydrogenation catalyst is recovered and removed from the viewpoint of productivity as needed. Such a hydrogenation catalyst can be efficiently recovered and removed in the production method according to the present invention, resulting in high productivity even if the recovery and removal of the hydrogenation catalyst is needed.
- the present inventor has conducted extensive research on an improvement in productivity of the production of a nitrile rubber having a carboxy group (preferably, production of a nitrile rubber through copolymerization of an ⁇ , ⁇ -ethylenic unsaturated carboxylic acid ester monomer), especially, that in the hydrogenation reaction step for the carboxy group-containing nitrile rubber.
- the present inventor has found that the productivity can be appropriately improved by heating the latex of the carboxy group-containing nitrile rubber at the above-described temperature in the state where the pH is adjusted in the range of 8.5 to 12, and performing the hydrogenation reaction in the state where the pH is adjusted to 5 to 8, and have completed the present invention.
- the pH of the latex of the carboxy group-containing nitrile rubber prepared through the polymerization step can be adjusted to 8.5 to 12 by any method.
- examples thereof include a method of adding a hydroxide of an alkali metal such as sodium hydroxide or potassium hydroxide; a carbonate of an alkali metal such as sodium carbonate or potassium carbonate; a hydrogen carbonate salt of an alkali metal such as sodium hydrogen carbonate; ammonia; an organic amine compound such as trimethylamine or triethanolamine; or the like to the latex of the carboxy group-containing nitrile rubber.
- a hydroxide of an alkali metal is preferred, and potassium hydroxide is more preferred.
- the heating step it is sufficient that heating is performed while the pH of the latex of the carboxy group-containing nitrile rubber is in the range of 8.5 to 12.
- the pH during heating is preferably 8.7 to 12, more preferably 9 to 12.
- An excessively low or high pH of the latex of the carboxy group-containing nitrile rubber during the heating step reduces the hydrogenation efficiency in the hydrogenation reaction, thus impeding the productivity improving effect.
- the heating temperature in the heating step is 50 to 85°C, preferably 55 to 80°C, more preferably 60 to 80°C.
- An excessively low heating temperature during the heating step reduces the hydrogenation efficiency in the hydrogenation reaction, thus impeding the productivity improving effect.
- an excessively high heating temperature during the heating step reduces not only the hydrogenation efficiency but also the yield of the carboxy group-containing nitrile rubber as a result of aggregation of solids in the latex of the carboxy group-containing nitrile rubber.
- the heating time in the heating step is preferably 0.5 to 10 hours, more preferably 1 to 8 hours, still more preferably 1 to 6 hours.
- the hydrogenation efficiency in the hydrogenation reaction can be further enhanced by controlling the heating time during the heating step within this range.
- heating be performed under a reduced pressure condition in the heating step when the latex of the carboxy group-containing nitrile rubber is heated in the state where the pH is controlled in the range of 8.5 to 12.
- volatile components such as residual monomers, which are contained in the latex of the carboxy group-containing nitrile rubber prepared through the polymerization step can also be effectively removed.
- the reduced pressure condition for heating under the reduced pressure condition is not particularly limited, it is preferably a degree of pressure reduction lower than atmospheric pressure by 0.03 MPa to 0.08 MPa (i.e., [(atmospheric pressure) - 0.03 MPa] to [(atmospheric pressure) - 0.08 MPa)], more preferably a degree of pressure reduction lower than atmospheric pressure by 0.05 to 0.08 MPa (i.e., [(atmospheric pressure) - 0.05 MPa] to [(atmospheric pressure) - 0.08 MPa]) .
- the heating under a reduced pressure condition may be performed using an evaporator or the like.
- the pH of the latex of the carboxy group-containing nitrile rubber may be adjusted to 8.5 to 12, and then the latex may be heated to 50 to 85°C; or the latex of the carboxy group-containing nitrile rubber may be heated to 50 to 85°C, and then the pH may be adjusted to 8.5 to 12.
- the hydrogenation reaction step in the production method according to the present invention is a step of subjecting the latex of the carboxy group-containing nitrile rubber after heated in the heating step to a hydrogenation reaction in the presence of a hydrogenation catalyst in the state where the pH is adjusted in the range of 5 to 8.
- the pH of the latex of the carboxy group-containing nitrile rubber after heated can be adjusted to 5 to 8 by any method. Examples thereof include a method of adding hydrochloric acid, nitric acid, sulfuric acid, or the like.
- the latex of the carboxy group-containing nitrile rubber after heated in the heating step is heated while the pH is being controlled in the range of 5 to 8.
- the pH is preferably 6 to 8, more preferably 6 to 7.5.
- the hydrogenation reaction is performed by an aqueous layer direct hydrogenation method of hydrogenating the latex of the carboxy group-containing nitrile rubber, which is prepared in the polymerization step and heated in the heating step, in the presence of a hydrogenation catalyst while the form of a latex is kept without generating aggregates.
- the latex of the carboxy group-containing nitrile rubber is preliminarily subjected to a heat treatment to heat the latex at 50 to 85°C in the state where the pH is adjusted in the range of 8.5 to 12, and the latex of the carboxy group-containing nitrile rubber subjected to such a heat treatment is subjected to the hydrogenation reaction in the state where the pH is controlled in the range of 5 to 8.
- a production method enables favorable progression of the hydrogenation reaction even if a relatively small amount of hydrogenation catalyst is used in the hydrogenation reaction.
- the hydrogenation catalyst can be any compound which is barely decomposed by water.
- palladium catalysts such as palladium salts of carboxylic acids such as formic acid, propionic acid, lauric acid, succinic acid, oleic acid, and phthalic acid; chlorides of palladium such as palladium chloride, dichloro(cyclooctadiene)palladium, dichloro(norbonadiene)palladium, and ammonium hexachloropalladate (IV); iodides such as palladium iodide; palladium sulfate ⁇ dihydrate; and the like.
- the amount of the hydrogenation catalyst to be used may be appropriately selected according to the iodine value of the carboxy group-containing hydrogenated nitrile rubber finally prepared.
- the amount is preferably 500 to 3000 ppm by weight, more preferably 800 to 3000 ppm by weight, particularly preferably 800 to 1300 ppm relative to the carboxy group-containing nitrile rubber components contained in the latex.
- the temperature for the hydrogenation reaction is usually 0 to 200°C, preferably 5 to 150°C, more preferably 10 to 100°C. Control of the temperature for the hydrogenation reaction within this range results in a sufficient reaction rate while side reactions are suppressed.
- the hydrogen pressure during the hydrogenation reaction is usually 0.10 to 20 MPa, preferably 0.10 to 15 MPa, more preferably 0.11 to 10 MPa.
- the reaction time is usually 30 minutes to 50 hours.
- the reaction system is first purged with an inert gas such as nitrogen, and then with hydrogen, and the pressure thereof is increased.
- a solid carboxy group-containing hydrogenated nitrile rubber may be obtained through coagulation by salting-out or using an alcohol such as methanol while the hydrogenation catalyst is left as it is in the latex, followed by filtration and drying.
- the hydrogenation catalyst in the latex is recovered and removed after the hydrogenation reaction in the hydrogenation reaction step is completed.
- the method of recovering and removing the hydrogenation catalyst include a method of precipitating the hydrogenation catalyst as an insoluble complex by adding and mixing a complexing agent to and with the latex after the completion of the hydrogenation reaction to complex the hydrogenation catalyst with the complexing agent, and then filtering the insoluble complex through a metal screen.
- the latex after the hydrogenation reaction is completed may be subjected to an oxidation treatment to oxidize the reduced catalyst present in the latex before the complexing agent is added or while the complexing agent is being mixed after the addition.
- the hydrogenation reaction can favorably progress even if a relatively small amount of the hydrogenation catalyst is used in the hydrogenation reaction, thus reducing the amount of the hydrogenation catalyst to be used.
- the recovery amount (removal amount) during recovery and removal of the hydrogenation catalyst can also be reduced in the case where the hydrogenation catalyst is recovered as an insoluble complex, thus effectively improving the production efficiency.
- the complexing agent can be any complexing agent that has complexing action to the metal (such as palladium) included in the hydrogenation catalyst, and generates a water-insoluble complex.
- examples thereof include oxime compounds. Because of their strong complex formation ability, preferred are dioxime compounds, and more preferred are ⁇ , ⁇ -alkanedione dioximes such as dimethylglyoxime and cyclohexanedione dioxime. Among these, dimethylglyoxime is particularly preferred.
- a solid carboxy group-containing hydrogenated nitrile rubber can be obtained from the latex of the carboxy group-containing hydrogenated nitrile rubber prepared in the hydrogenation reaction step and optionally subjected to recovery and removal of the hydrogenation catalyst through coagulation by salting-out or an alcohol such as methanol, followed by filtration and drying.
- the filtration and drying steps subsequent to the coagulation step may be performed by known methods.
- the iodine value of the carboxy group-containing hydrogenated nitrile rubber prepared by the production method according to the present invention is not particularly limited, and may be appropriately selected according to desired properties.
- the iodine value is preferably 120 or less, more preferably 100 or less, still more preferably 80 or less, particularly preferably 23 or less.
- the lower limit of the iodine value, although not particularly limited, is usually 3 or more.
- the carboxy group-containing hydrogenated nitrile rubber prepared by the production method according to the present invention has a polymer Mooney viscosity (ML1+4, 100°C) of preferably 10 to 200, more preferably 15 to 150, still more preferably 15 to 100, particularly preferably 30 to 90. Control of the polymer Mooney viscosity within this range results in favorable processability of a cross-linkable rubber composition containing a cross-linking agent and favorable mechanical properties after cross-linking thereof.
- the present invention also provides a method for producing a cross-linkable rubber composition, comprising producing a carboxy group-containing hydrogenated nitrile rubber by the method according to the present invention as disclosed herein; and mixing the carboxy group-containing hydrogenated nitrile rubber with a cross-linking agent.
- cross-linking agent examples include, but should not be limited to, sulfur-based cross-linking agents, organic peroxide-based cross-linking agents, polyamine-based cross-linking agents, and the like. Preferred are polyamine-based cross-linking agents to provide a cross-linked rubber having further enhanced permanent compression set resistance.
- the polyamine-based cross-linking agent can be any compound having two or more amino groups or any compound which turns into a compound having two or more amino groups during cross-linking.
- Preferred are compounds having hydrogen atoms of an aliphatic hydrocarbon or an aromatic hydrocarbon which are substituted by amino groups or hydrazide structures (a structure represented by -CONHNH 2 where CO represents a carbonyl group), and those which turn into such compounds during cross-linking.
- polyamine-based cross-linking agents include aliphatic polyvalent amines such as hexamethylenediamine, hexamethylenediamine carbamate, N,N-dicinnamylidene-1,6-hexanediamine, tetramethylenepentamine, and hexamethylenediamine cinnamaldehyde adducts; aromatic polyvalent amines such as 4,4-methylenedianiline, m-phenylenediamine, 4,4-diaminodiphenyl ether, 3,4-diaminodiphenyl ether, 4,4-(m-phenylenediisopropylidene)dianiline, 4,4-(p-phenylenediisopropylidene)dianiline, 2,2-bis[4-(4-amino phenoxy)phenyl]propane, 4,4-diaminobenzanilide, 4,4-bis(4-aminophenoxy)b
- aliphatic polyvalent amines and aromatic polyvalent amines preferred are aliphatic polyvalent amines and aromatic polyvalent amines, more preferred are hexamethylenediamine carbamate and 2,2-bis[4-(4-aminophenoxy)phenyl]propane, and particularly preferred is hexamethylenediamine carbamate to provide a further remarkable effect of the present invention.
- the content of the cross-linking agent in the cross-linkable rubber composition according to the present invention is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 5 parts by weight relative to 100 parts by weight of the carboxy group-containing hydrogenated nitrile rubber.
- cross-linkable rubber composition further contain a basic cross-linking accelerator when a polyamine-based cross-linking agent is used as a cross-linking agent.
- the basic cross-linking accelerator include basic cross-linking accelerators having a cyclic amidine structure, such as 1,8-diazabicyclo[5,4,0]undecene-7 (hereinafter, abbreviated to "DBU” in some cases), 1,5-diazabicyclo[4,3,0]nonene-5 (hereinafter, abbreviated to "DBN” in some cases), 1-methylimidazole, 1-ethylimidazole, 1-phenylimidazole, 1-benzylimidazole, 1,2-dimethylimidazole, 1-ethyl-2-methylimidazole, 1-methoxyethylimidazole, 1-phenyl-2-methylimidazole, 1-benzyl-2-methylimidazole, 1-methyl-2-phenylimidazole, 1-methyl-2-benzylimidazole, 1,4-dimethylimidazole, 1,5-dimethylimidazole, 1,2,4-trimethylimidazole,
- guanidine-based basic cross-linking accelerators preferred are guanidine-based basic cross-linking accelerators, secondary amine-based basic cross-linking accelerators, and basic cross-linking accelerators having a cyclic amidine structure
- basic cross-linking accelerators having a cyclic amidine structure more preferred are basic cross-linking accelerators having a cyclic amidine structure, still more preferred are 1,8-diazabicyclo[5,4,0]undecene-7 and 1,5-diazabicyclo[4,3,0]nonene-5, and particularly preferred is 1,8-diazabicyclo[5,4,0]undecene-7.
- the basic cross-linking accelerators having a cyclic amidine structure may form salts with organic carboxylic acids or alkyl phosphoric acids.
- the secondary amine-based basic cross-linking accelerators may be those mixed with an alcohol such as an alkylene glycol or an alkyl alcohol having 5 to 20 carbon atoms, and may further contain an inorganic acid and/or an organic acid.
- the secondary amine-based basic cross-linking accelerators each may form a salt with the inorganic acid and/or the organic acid, and may further form a complex with the alkylene glycol.
- the amount of the basic cross-linking accelerator compounded in the cross-linkable rubber composition according to the present invention is preferably 0.1 to 20 parts by weight, more preferably 0.2 to 15 parts by weight, still more preferably 0.5 to 10 parts by weight relative to 100 parts by weight of the carboxy group-containing hydrogenated nitrile rubber.
- the cross-linkable rubber composition according to the present invention may also contain other compounding agents usually used in the field of rubber processing.
- compounding agents include reinforcing agents, fillers, photostabilizers, scorch retardants, plasticizers, processing aids, lubricants, tackifiers, lubricants, flame retardants, acid acceptors, antifungal agents, antistatic agents, colorants, silane coupling agents, cross-linking aids, co-cross-linking agents, cross-linking accelerators, cross-linking retarders, foaming agents, and the like.
- These compounding agents can be used in an appropriately compounding amount according to the purpose of compounding.
- the plasticizer to be used can be trimellitic acid-based plasticizers and ether ester-based plasticizers. Specific examples thereof include tri-2-ethylhexyl trimellitate, isononyl trimellitate ester, bis[2-(2-butoxyethoxy)ethyl] adipate, diheptanoate, di-2-ethylhexanoate, didecanoate, and the like. These can be used alone or in combination.
- cross-linkable rubber composition according to the present invention may contain rubbers other than the carboxy group-containing hydrogenated nitrile rubber described above in the range not impairing the effects of the present invention.
- Examples of such rubbers include acrylic rubbers, ethylene-acrylic acid copolymer rubbers, fluorocarbon rubbers, styrene-butadiene copolymer rubbers, polybutadiene rubbers, ethylene-propylene copolymer rubbers, ethylene-propylene-diene ternary copolymer rubbers, epichlorohydrin rubbers, urethane rubbers, chloroprene rubbers, silicone rubbers, fluorosilicone rubbers, chlorosulfonated polyethylene rubbers, natural rubbers, polyisoprene rubbers, and the like.
- the amount of the rubbers other than the carboxy group-containing hydrogenated nitrile rubber compounded in the cross-linkable rubber composition is preferably 30 parts by weight or less, more preferably 20 parts by weight or less, still more preferably 10 parts by weight or less relative to 100 parts by weight of the carboxy group-containing hydrogenated nitrile rubber.
- the cross-linkable rubber composition according to the present invention is prepared by mixing the above-mentioned components preferably in a non-aqueous system.
- the cross-linkable rubber composition according to the present invention can be prepared by any method.
- the cross-linkable rubber composition according to the present invention can be prepared by primarily kneading the components excluding the cross-linking agent and agents unstable to heat such as a co-cross-linking agent with a mixer such as a Banbury mixer, an intermixer, a kneader, or the like, transferring the kneaded product to an open roll mill, and adding the cross-linking agent and agents unstable to heat such as the cross-linking accelerator thereto to perform secondary kneading.
- Primary kneading is performed usually at 10 to 200°C, preferably at 30 to 180°C for 1 minute to 1 hour, preferably 1 minute to 30 minutes, and secondary kneading is performed usually at 10 to 90°C, preferably at 20 to 60°C for 1 minute to 1 hour, preferably 1 minute to 30 minutes.
- the present invention also provides a method for producing a cross-linked rubber, comprising producing a cross-linkable rubber composition by the method according to the present invention as disclosed herein; and cross-linking the cross-linkable rubber composition.
- the cross-linked rubber according to the present invention can be produced by molding the cross-linkable rubber composition according to the present invention using a molding machine suited for a desired shape, such as an extruder, an injection molding machine, a compressor, a roll, or the like, and performing a cross-linking reaction by heating to fix the shape of the product as a cross-linked product.
- the cross-linkable rubber composition may be preliminarily molded and then cross-linked, or may be cross-linked simultaneously with molding.
- the molding temperature is usually 10 to 200°C, preferably 25 to 120°C.
- the cross-linking temperature is usually 100 to 200°C, preferably 130 to 190°C, and the cross-linking time is usually 1 minute to 24 hours, preferably 2 minutes to 1 hour.
- the inside of the cross-linked rubber may not be sufficiently cross-linked even if the surface thereof is cross-linked. For this reason, the cross-linked rubber may be further heated for secondary cross-linking.
- a general method used in cross-linking of rubber such as press heating, steam heating, oven heating, hot air heating, or the like, can be appropriately selected for the heating method.
- the cross-linked rubber according to the present invention thus prepared is obtained using the carboxy group-containing hydrogenated nitrile rubber prepared by the production method according to the present invention described above, thus resulting in properties derived from the carboxy group-containing hydrogenated nitrile rubber, that is, high oil resistance, mechanical properties, and permanent compression set resistance. Utilizing such properties, the cross-linked rubber according to the present invention thus prepared can be suitably used in a variety of applications.
- the proportions of the monomer units forming the carboxy group-containing hydrogenated nitrile rubber were measured by the following method.
- the proportion of mono-n-butyl maleate units was determined as follows: 100 ml of 2-butanone was added to 0.2 g of 2 mm-square carboxy group-containing nitrile rubber before a hydrogenation reaction, and was stirred for 4 hours. 20 ml of Ethanol and 10 ml of water were added. Under stirring, the resulting solution was titrated with a 0.02 N hydrous ethanol solution of potassium hydroxide at room temperature using thymolphthalein as an indicator to determine the molar number of carboxy groups relative to 100 g of the carboxy group-containing nitrile rubber. The proportion of mono-n-butyl maleate units was calculated by converting the resulting molar number into the amount of mono-n-butyl maleate units.
- the proportions of 1,3-butadiene units and saturated butadiene units were calculated by measuring the iodine value (according to JIS K6235) before and after the hydrogenation reaction of the carboxy group-containing nitrile rubber.
- the proportion of acrylonitrile units was calculated by measuring the nitrogen content in the carboxy group-containing hydrogenated nitrile rubber by the Kjeldahl method.
- n-butyl acrylate units The proportion of n-butyl acrylate units was calculated as the balance of the monomer units above.
- the iodine value of the carboxy group-containing hydrogenated nitrile rubber was calculated in accordance with JIS K6235.
- the metal bottle was kept at 5°C, and 0.1 parts of cumene hydroperoxide (polymerization initiator), and appropriate amounts of a reducing agent, a chelating agent, and a builder were added.
- a polymerization reaction was performed for 16 hours while the metal bottle was being rotated. Subsequently, when the polymerization conversion ratio reached 85%, 4 parts of 2.5 wt% 2,2,6,6-tetramethylpiperidine-1-oxyl aqueous solution (polymerization terminator) was added to terminate the polymerization reaction.
- a latex of a carboxy group-containing nitrile rubber was thereby prepared.
- the latex of the carboxy group-containing nitrile rubber had a pH of 3.0.
- the latex prepared above and a palladium catalyst a mixed solution of 1 wt% palladium acetate acetone solution and deionized water having an equivalent weight
- deionized water in an amount to give a solid content of 15 wt% in the latex of the carboxy group-containing nitrile rubber were added to an autoclave such that the palladium content was 1000 ppm by weight relative to the dry weight of the rubber contained in the latex of the carboxy group-containing nitrile rubber.
- the hydrogenation reaction was performed at a hydrogen pressure of 3 MPa and a temperature of 50°C for 6 hours to prepare a latex of a carboxy group-containing hydrogenated nitrile rubber (N1).
- dimethylglyoxime (complexing agent) in an amount of 2.5 molar equivalents relative to palladium used in the hydrogenation reaction was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N1), and was stirred at 80°C for 3 hours to precipitate palladium as an insoluble complex.
- 1 L of the latex containing the insoluble complex was continuously poured onto an 80-mesh metal screen to remove the insoluble complex. As a result, in Example 1, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 140 ppm by weight.
- the latex after removal of palladium as the hydrogenation catalyst was coagulated by adding a 2-fold volume of methanol to the latex, and was dried in vacuum at 60°C for 12 hours to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N1).
- the carboxy group-containing hydrogenated nitrile rubber (N1) had an iodine value of 20, and had a composition consisting of 21 wt% of acrylonitrile units, 39 wt% of 1,3-butadiene units (including hydrogenated units), 5 wt% of mono-n-butyl maleate units, and 35 wt% of n-butyl acrylate units.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N2) was prepared in the same manner as in Example 1 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition in the state where the pH was adjusted to 11.0.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N2) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Example 2, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 130 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 1 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N2).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N3) was prepared in the same manner as in Example 1 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition in the state where the pH was adjusted to 12.0.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N3) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Example 3, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 140 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 1 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N3).
- the iodine value and the composition are as shown in Table 1.
- the metal bottle was kept at 5°C, 0.1 parts of cumene hydroperoxide (polymerization initiator) and appropriate amounts of a reducing agent, a chelating agent, and a builder were added.
- a polymerization reaction was performed for 16 hours while the metal bottle was being rotated. Subsequently, when the polymerization conversion ratio reached 85%, 4 parts of 2.5 wt% 2,2,6,6-tetramethylpiperidine-1-oxyl aqueous solution (polymerization terminator) was added to terminate the polymerization reaction.
- a latex of a carboxy group-containing nitrile rubber was thereby prepared.
- the latex of the carboxy group-containing nitrile rubber had a pH of 2.8.
- the latex prepared above and a palladium catalyst a mixed solution of 1 wt% palladium acetate acetone solution and deionized water having an equivalent weight
- deionized water in an amount to give a solid content of 15 wt% in the latex of the carboxy group-containing nitrile rubber were added to an autoclave such that the palladium content was 1000 ppm by weight relative to the dry weight of the rubber contained in the latex of the carboxy group-containing nitrile rubber.
- the hydrogenation reaction was performed at a hydrogen pressure of 3 MPa and a temperature of 50°C for 6 hours to prepare a latex of a carboxy group-containing hydrogenated nitrile rubber (N4).
- dimethylglyoxime (complexing agent) in an amount of 2.5 molar equivalents relative to palladium used in the hydrogenation reaction was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N4), and was stirred at 80°C for 3 hours to precipitate palladium as an insoluble complex.
- 1 L of the latex containing the insoluble complex was continuously poured onto an 80-mesh metal screen to remove the insoluble complex. As a result, in Example 4, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 200 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 1 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N4).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N5) was prepared in the same manner as in Example 4 except that the hydrogenation reaction of the latex of the carboxy group-containing nitrile rubber was performed in the state where the pH was adjusted to 7.3.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N5) to form an insoluble complexing, and the insoluble complex was removed using an 80-mesh metal screen. Also in Example 5, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 200 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 4 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N5).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N6) was prepared in the same manner as in Example 3 except that the latex of the carboxy group-containing nitrile rubber was subjected to the heat treatment under the reduced pressure condition using a rotary evaporator (water temperature: 60°C).
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N6) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Example 6, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 150 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 3 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N6).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N7) was prepared in the same manner as in Example 1 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition at a pH of 3.0 as it was.
- the pH of the latex before the hydrogenation reaction was adjusted using a 2.5 wt% potassium hydroxide aqueous solution.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N7) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Comparative Example 1, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 150 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 1 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N7).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N8) was prepared in the same manner as in Comparative Example 1 except that the amount of the palladium catalyst used in the hydrogenation reaction was 1500 ppm by weight in terms of palladium content.
- the pH of the latex before the hydrogenation reaction was adjusted using a 2.5 wt% potassium hydroxide aqueous solution.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N8) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen.
- the metal screen was clogged during the treatment of 1 L of the latex, and exchange of the metal screen was needed.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 150 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 1 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N8).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N9) was prepared in the same manner as in Example 1 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition in the state where the pH was adjusted to 12.5.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N9) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Comparative Example 3, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 140 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 1 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N9).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N10) was prepared in the same manner as in Example 4 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition at a pH of 2.8 as it was.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N10) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Comparative Example 4, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 220 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 4 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N10).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N11) was prepared in the same manner as in Example 4 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition in the state where the pH was adjusted to 7.0 and the hydrogenation reaction of the latex of the carboxy group-containing nitrile rubber was performed in the state where the pH was adjusted to 7.0.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N11) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Comparative Example 5, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 210 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 4 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N11).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N12) was prepared in the same manner as in Example 4 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition in the state where the pH was adjusted to 12.0 and the hydrogenation reaction of the latex of the carboxy group-containing nitrile rubber was performed in the state where the pH was adjusted to 4.0.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N12) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Comparative Example 6, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 200 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 4 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N12).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N13) was prepared in the same manner as in Example 4 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition in the state where the pH was adjusted to 12.0 and the hydrogenation reaction of the latex of the carboxy group-containing nitrile rubber was performed in the state where the pH was adjusted to 9.0.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N13) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Comparative Example 7, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 200 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 4 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N13).
- the iodine value and the composition are as shown in Table 1.
- a latex of a carboxy group-containing hydrogenated nitrile rubber (N14) was prepared in the same manner as in Example 4 except that the latex of the carboxy group-containing nitrile rubber was subjected to a heat treatment under the reduced pressure condition in the state where the pH was adjusted to 12.0 and the hydrogenation reaction of the latex of the carboxy group-containing nitrile rubber was performed in the state where the pH was adjusted to 12.0.
- dimethylglyoxime was added to 1 L of the latex of the carboxy group-containing hydrogenated nitrile rubber (N14) to form an insoluble complex, and the insoluble complex was removed using an 80-mesh metal screen. Also in Comparative Example 8, the insoluble complex in 1 L of the latex could be removed without clogging of the metal screen.
- the amount of residual molecular weight modifier having a mercapto group was measured according to the method above. The measurement was 200 ppm by weight.
- the latex was coagulated and dried in the same manner as in Example 4 to prepare a solid carboxy group-containing hydrogenated nitrile rubber (N14).
- the iodine value and the composition are as shown in Table 1.
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Claims (6)
- Procédé pour produire un caoutchouc de nitrile hydrogéné contenant un groupe carboxy, comprenant :une étape de préparation d'un latex d'un caoutchouc de nitrile contenant un groupe carboxy par polymérisation en émulsion d'un mélange de monomères dans un milieu dispersif, le mélange de monomères contenant au moins un monomère de nitrile à insaturation α,β-éthyiénique et un monomère contenant un groupe carboxy ;une étape de chauffage du latex du caoutchouc de nitrile contenant un groupe carboxy à une température de 50 à 85°C dans un état où le pH est ajusté dans la plage allant de 8,5 à 12 ; etune étape de soumission du latex du caoutchouc de nitrile contenant un groupe carboxy après le chauffage à une réaction d'hydrogénation en présence d'un catalyseur d'hydrogénation dans un état où le pH est ajusté dans la plage allant de 5 à 8.
- Procédé pour produire un caoutchouc de nitrile hydrogéné contenant un groupe carboxy selon la revendication 1, dans lequel le latex du caoutchouc de nitrile contenant un groupe carboxy est chauffé dans un état sous pression réduite.
- Procédé pour produire un caoutchouc de nitrile hydrogéné contenant un groupe carboxy selon la revendication 1 ou 2, comprenant en outre une étape d'élimination du catalyseur d'hydrogénation dans le latex du caoutchouc de nitrile contenant un groupe carboxy après la réaction d'hydrogénation.
- Procédé pour produire un caoutchouc de nitrile hydrogéné contenant un groupe carboxy selon l'une quelconque des revendications 1 à 3, dans lequel le caoutchouc de nitrile hydrogéné contenant un groupe carboxy contient 5 à 60 % en poids du monomère de nitrile à insaturation α,β-éthyiénique et 1 à 30 % en poids du monomère contenant un groupe carboxy.
- Procédé pour produire une composition de caoutchouc réticulable, comprenant : la production d'un caoutchouc de nitrile hydrogéné contenant un groupe carboxy par le procédé de l'une quelconque des revendications 1 à 4 ; et le mélange du caoutchouc de nitrile hydrogéné contenant un groupe carboxy avec un agent de réticulation.
- Procédé pour produire un caoutchouc réticulé, comprenant :
la production d'une composition de caoutchouc réticulable par le procédé selon la revendication 5 ; et la réticulation de la composition de caoutchouc réticulable.
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JP2018011379 | 2018-01-26 | ||
PCT/JP2019/001510 WO2019146526A1 (fr) | 2018-01-26 | 2019-01-18 | Procédé de production de caoutchouc de nitrile hydrogéné contenant un groupe carboxyle |
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EP3744739A1 EP3744739A1 (fr) | 2020-12-02 |
EP3744739A4 EP3744739A4 (fr) | 2021-10-27 |
EP3744739B1 true EP3744739B1 (fr) | 2023-12-27 |
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EP19743563.9A Active EP3744739B1 (fr) | 2018-01-26 | 2019-01-18 | Procédé de production de caoutchouc de nitrile hydrogéné contenant un groupe carboxyle |
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US (1) | US11370849B2 (fr) |
EP (1) | EP3744739B1 (fr) |
JP (1) | JP7173051B2 (fr) |
CN (1) | CN111587255B (fr) |
TW (1) | TWI788509B (fr) |
WO (1) | WO2019146526A1 (fr) |
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CN116656229B (zh) * | 2023-04-18 | 2024-06-14 | 淮阴工学院 | 一种耐污型改性水性聚氨酯涂层的制备方法 |
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CA2015804C (fr) * | 1990-05-01 | 1996-10-22 | Garry L. Rempel | Procede d'hydrogenation de polymeres |
CA2304501A1 (fr) * | 2000-04-10 | 2001-10-10 | Bayer Inc. | Processus d'hydrogenation de caoutchouc nitrile carboxylate, le caoutchouc hydrogene resultant et ses applications |
JP4110266B2 (ja) * | 2002-03-22 | 2008-07-02 | 日本ゼオン株式会社 | 共重合体及びその製造方法、並びに水素化共重合体の製造方法 |
JP5319114B2 (ja) * | 2005-02-23 | 2013-10-16 | 日本ゼオン株式会社 | ニトリル基含有共重合ゴム及び加硫性ニトリル基含有共重合ゴム組成物 |
WO2007072900A1 (fr) * | 2005-12-21 | 2007-06-28 | Zeon Corporation | Composition de caoutchouc reticulable et produit de caoutchouc reticule |
US8742006B2 (en) * | 2006-04-17 | 2014-06-03 | Zeon Corporation | Cross-linkable nitrile rubber composition and cross-linked rubber |
JP5315838B2 (ja) | 2008-07-31 | 2013-10-16 | 日本ゼオン株式会社 | 接着剤組成物、複合体及び自動車用部材 |
JP5640748B2 (ja) * | 2009-01-30 | 2014-12-17 | 日本ゼオン株式会社 | ニトリル基含有高飽和共重合体ゴム |
CN102471420B (zh) * | 2009-07-24 | 2015-05-13 | 日本瑞翁株式会社 | 胶乳及粘接剂组合物 |
EP2325237A1 (fr) * | 2009-11-19 | 2011-05-25 | LANXESS Deutschland GmbH | Suspensions stables à particules fines de caoutchouc nitrile totalement ou partiellement hydrogéné et fonctionnalisé |
JP5591724B2 (ja) | 2011-01-21 | 2014-09-17 | 日本ゼオン株式会社 | ゴム補強用コード及びそれを用いたゴム製品 |
EP2692788B1 (fr) * | 2011-03-31 | 2015-12-30 | Zeon Corporation | Composition à base de caoutchouc nitrile hautement saturé et caoutchouc réticulé |
EP2719824B1 (fr) | 2011-06-10 | 2017-02-22 | Nippon Sheet Glass Company, Limited | Cordon de renfort pour renforcer un produit en caoutchouc, et produit en caoutchouc utilisant ledit cordon |
WO2015046559A1 (fr) * | 2013-09-30 | 2015-04-02 | 日本ゼオン株式会社 | Caoutchouc de copolymère de nitrile et son procédé de production |
EP2918611A1 (fr) * | 2014-03-10 | 2015-09-16 | LANXESS Deutschland GmbH | Procédé pour la réduction de groupes nitrile de caoutchouc nitrile hydrogéné |
WO2016104350A1 (fr) | 2014-12-26 | 2016-06-30 | 日本ゼオン株式会社 | Latex pour garniture de friction, et garniture de friction |
RU2017140070A (ru) * | 2015-05-26 | 2019-06-26 | Зэон Корпорейшн | Высоконасыщенный сополимерный каучук, содержащий нитрильные группы |
CN107849314A (zh) * | 2015-07-15 | 2018-03-27 | 日本瑞翁株式会社 | 腈橡胶组合物和橡胶交联物 |
WO2017164077A1 (fr) | 2016-03-23 | 2017-09-28 | 日本ゼオン株式会社 | Composition de latex, et matériau de friction |
US11067145B2 (en) | 2016-03-23 | 2021-07-20 | Zeon Corporation | Method for producing latex composition |
-
2019
- 2019-01-18 WO PCT/JP2019/001510 patent/WO2019146526A1/fr unknown
- 2019-01-18 EP EP19743563.9A patent/EP3744739B1/fr active Active
- 2019-01-18 US US16/963,636 patent/US11370849B2/en active Active
- 2019-01-18 CN CN201980008190.2A patent/CN111587255B/zh active Active
- 2019-01-18 JP JP2019567044A patent/JP7173051B2/ja active Active
- 2019-01-22 TW TW108102359A patent/TWI788509B/zh active
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TW201936754A (zh) | 2019-09-16 |
US20210061927A1 (en) | 2021-03-04 |
JP7173051B2 (ja) | 2022-11-16 |
CN111587255A (zh) | 2020-08-25 |
WO2019146526A1 (fr) | 2019-08-01 |
JPWO2019146526A1 (ja) | 2021-01-07 |
EP3744739A4 (fr) | 2021-10-27 |
EP3744739A1 (fr) | 2020-12-02 |
US11370849B2 (en) | 2022-06-28 |
TWI788509B (zh) | 2023-01-01 |
CN111587255B (zh) | 2022-06-14 |
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